package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;

import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

@Service
public class UserServiceImpl implements UserService {

    private static final String WX_LOGIN ="https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO.getCode());
        if (openid.isEmpty()){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        User user = userMapper.getByOpenId(openid);
        if (user==null){
            user = User.builder()
                     .openid(openid)
                     .createTime(LocalDateTime.now())
                     .build();
            userMapper.insert(user);
        }
        return user;
    }

    private String getOpenid(String code) {
        HashMap<String, String> Wx_Login = new HashMap<>();
        Wx_Login.put("appid",weChatProperties.getAppid());
        Wx_Login.put("secret",weChatProperties.getSecret());
        Wx_Login.put("js_code",code);
        Wx_Login.put("grant_type","authorization_code");

        String json =  HttpClientUtil.doGet(WX_LOGIN, Wx_Login);

        JSONObject jsonObject = JSON.parseObject(json);
        return jsonObject.getString("openid");
    }
}
